Magneto-electric machine



Jan. 1 1924.

G. M. TURNER MAGNETO ELECTRIC MACHINE Filed y 19. 1920 3 Sheets-Sheet 5 VE/YTO IE 611-0265 1 73/8 Patented Jan. 1, 1924.

UNITED STATES GEORGE MALCOLM TURNER, OF SOUTH KENSINGTON, LONDON, ENGLAND.

MAGNETO ELECTRIC MACHINE.

I Application filed July 19, 1920. Serial No. 897,481.

(GRANTED UNDER THE PROVISIONS. OF :THE ACT OF MARCH 3, 1921, 41 STAT. L, 1313.)

To all whom it may 0011 cam Be it known that I, GEORGE MALCOLM TURNER, a subject of the King of Great Britaim and Ireland, and a resident of South Kensington, county of London, England,

have invented a certain new and useful Im I provement in the Construction of Magneto- Electric Machines, for which I have obtained Letters Patent in Great Britain, No. 142,177, dated Jan. 28, 1919, and of which the following is a specification.

' This invention relates to improvements in magneto-electric machines of the type particularly adapted for use in connection with internal combustion motors.

One of the objects of the present invention is to provide means whereby several simultaneous and independent currents may be obtained from a single magneto for synchronous ignition, thereby gaining full benefit of each spark during the firing stroke of the motor and thereby increasing the horsepower of the engine by complete combustion of the fuel. Heretofore in order to obtain efiective synchronous sparking, it has been the practice to use either separate synchronized magnetos or else two sparks in series, which can produce only half the desired heating efi'ect.

Accordingly, the present invention proposes to obviate the necessity of using synchronized magneto machines for the obtaining of synchronized ignition, and in that connection eliminate the losses due to incorrect timing on account of the creeping out of step of the two synchronized magneto machines.

Having thus declared the nature and objects of this invention, the manner in which this is to be performed is to make use of a 40 magneto electric generator. This generator being composed of coils, such that they comprise a primary and secondary winding, in

which current is generated in the usual man ner, by means of the use of permanent magnetic fields, and increased in a well known manner by the action of a circuit breaker, or the like, and condenser.

From such machines I am able to obtain sparks as desired by arranging'details to 5 take advantage of the fact that in each of the component coils placed as herein indicated, a separate current peak is generated, accompanied by accurate timing, both induction and timing being further emphaand circuit breaker, and distributor of two segments at 90 degrees apart, as a distributing device therefor, the whole forming an apparatus for supplying current for the ignition of four-cylinder engines, and to this arrangement I make no claim.

I am aware that multipolar induction magnetos have been developed for ignition purposes, without the use of an interrupter device, relying only on a transformer action to generate a high potential, and to the breaking down point of the spark gap resistance, or else the magnetic break for timing purposes, and to these I make no claim.

I am also aware that a multipolar inductor magneto has been produced for wireless and field telegraph, and to this I make no claim.

In the accompanying drawings, which are to be regarded as diagrammatic,

Figure 1 is a diagrammatic view showing (partly in section) the relative arrangement of parts of the present magneto construction.

Figure 2 is a diagrammatic end elevation, the line A-B therein indicating the line of section for the sectional portion of Figure 1.

Figures 3, 4-, 5 and 6 are diagrammatic views showing the path of the flux.

Figure 7 is a detail diagram of the stationary distributor and brush arrangement.

Figure 8 is a diagram showing the ignition connections for a two-cylinder engine.

Similar reference characters designate corresponding parts in the several figures of the drawings.

In Figure 1; C, B, H represents a contact breaker; R, B, H ball-race housing; S, shaft. D, distributor (stationary); I, T insulated high tension terminal connections; B, brush; T, collector, or collecting device; D, O dust cover; Ill, magneto; C, I) cross laminations; "C, I coil; C, I, S section of Cll 1; Fl pole 1 of magnet M; P2 pole 2 of magnet M as v ductor segments.

In Figure 2 these letters correspond; in addition 39 and P represent the poles of the magnet'M in section; C C C, C stationary armature coils in which the currents are generated, and which may be placed as desired, and used as required in conjunction with a circuit breaker, rotor and the like, or as shown. I cast iron or laminated inductors; A, C inductor or rotor core, in this arrangement (as shown) of non-magnetic metal.

Figures 3, 4, 5 and 6 of the drawings show the flux ath which, starting from pole N of magnet F (Figures 3 and 5'), goes to pole tips C, I, I T, then through segment I (Figure 5) to other pole tips I1, then enters core of coil C and thence into the cross laminations CL of pole tips [1, as shown in Figure 4. From the core of coil C of L,the flux enters the cross laminations CL which provide the path to the coreof coil C (see Figure 4), then it passes through core of the coil C to the rotor end where it enters pole tips L for C (see Figures 3 and 59, thence around to pole Similarly, the separate path of the flu from M can be followed, and the alternations or fluctuations caused by the inductor are clear. This movement of the lines of force generates in the coils an electro-motive force in the usual well known manner.

Figures 4 and 7 illustrate coils in the background, the same being designated C C C and C. Coil C is shown connected in series with C by high tension lead IF, and,

coil C and C are shown connected by the lead L. t

Also high tension leads HTL are shown in dotted lines connecting each coil to the segment S,. In this arrangement the segments are shown connected in multipleand arranged at angles of The stationary distributor, STD, isshown more in detail in Figure 7 of the drawings and in Figure 1 is indicated by the line appearing between parts T and CL. In Figure 7, T the collecting device, is shown with two brushes B collecting and distributing through to D, as indicated by Figure 1. In the particular arrangement shown these two brushes B are shown as set diagonally opposite each other, though it will of course intense be understood that the actual arrangement of brushes is dependent upon the relative speeds of the magneto and engine, and other details.

The adaptation of the type of fields herein shown and explained for the purposes of generating currents suitable for high and low tension ignition, for charging batteries, lighting, signalling, and other purposes, is obvious; and although I show a special adaptation of a two magnet horse-shoe field, I may make asimilar salient field of three or more separate horse-shoe magnets; or I may connect the yokes of F to P and I to P thus forming an alternative multipolar ffield, in a convenient manner, of any desired cross-section and number of poles. v The wiring and timing diagram of Figure 8 shows the connections and how the current peaks may be utilized for synchronous ignition.

Figure 8 shows the general character of the case under consideration, a single contact breaker c and condenser 0 being shown. In this figure the primary is designated as m the high tension coil designated as y and the connections leading to cylinder No. 1 are designated as 2 and the connections leading to cylinder No. 2 are designated as 2 I claim A multi-polar inductor magneto-electric machine including permanent multi-polar horse shoe'magnets having cast iron salient pole tips, stationary high and low tension coils wound on laminated cores and arranged alternately with respect to the salient pole tips of the magnets and parallel to, and within,'the legs of the magnets a shaft par allel to. said laminated cores and the legs of the magnets, an inductor having laminated inulti-segments rotatably mounted on said shaft within the space formed by said coils and pole tips, cross laminations mounted concentrically on said shaft within and across the arch of the magnets, whereby the magnetic flux returning within the legs of the magnets will traverse the core laminations and cross laminations by way of the inductor segments and pole tips, a stationary distributor arranged on said shaft adjacent said cross laminations', insulated high tension terminal connections for said distributor, a collector device carried by the shaft and having brushes engaging said distributor, a circuit interrupter device externally mounted on the arch of said magnets and connected with the end of the shaft projectin through said arch.

n testimony whereofI have afiixed my signature hereto this fifth day of July, 1920.

GEORGE MALCOLM TURNER. 

